<template>
    <div class="login_container">
        <div class="login_box">
            <!--图标区域-->
            <div class="avater_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!--登录表单区域-->
            <el-form ref="loginFormRef" :model="loginForm" class="login_form" :rules="loginFormRules">
                <!--用户名-->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user" ></el-input>
                </el-form-item>
                <!--密码-->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password" ></el-input>
                </el-form-item>
                <!--按钮-->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>

export default {
    data() {
      return {
        // 登录表单的数据绑定对象
        loginForm: {
        username: 'admin',
        password: '123456'
        },

        // 验证规则 用户名和密码
        loginFormRules: {
            username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 6, message: '请输入用户名,长度在3-6个字符之间', trigger: 'blur' }
          ],
            password: [
            { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 6, max: 15, message: '请输入用户名,长度在6-15个字符之间', trigger: 'blur' }
          ]
        }
        }
    },
    methods: {
        // 点击重置按钮
        resetLoginForm() {
            // console.log(this)
        this.$refs.loginFormRef.resetFields()
        },
        login() {
        // 第一个参数valid是一个boolean，通过判断可以确定表单验证是否通过
        this.$refs.loginFormRef.validate(async valid => {
            if (!valid) return false
            const { data: res } = await this.$http.post('login', this.loginForm)
            // console.log(res);
            if (res.meta.status != 200) return this.$message.error('登录失败')  //eslint-disable-line
            this.$message.success('登录成功')
            // token存储到会话session中
            window.sessionStorage.setItem('token', res.data.token)
            // 跳转后台
            this.$router.push('/home')
        })
        }
    }
}

</script>

<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100%;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #ffffff;
    border-radius: 3px;
    position:absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.avater_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eeeeee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffffff;
    img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eeeeee;
    }
}

.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.btns{
    display: flex;
    justify-content: flex-end;
}
</style>
